使用mysql将表格列中的逗号分隔值拆分为行? [英] Split comma separated value from table column into rows using mysql?
本文介绍了使用mysql将表格列中的逗号分隔值拆分为行?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我发现了帖子,其中该列的3个值用逗号分隔.我将使用逗号分隔三个以上的值.例如,
I found the post which has the column with 3 values seperated by commas. I will have more than 3 values seperated by commas . For example,
ID CITY_ID
--------------
1 12,18,16,17,35
2 12,16
....
--------------
是否可以使用如下所示的mysql查询将字符串city_id拆分成行
Is it possible to split string city_id and make it into rows using mysql query like below
ID CITY_ID
-------------
1 12
1 18
1 16
....
2 16
....
--------------
如果是,请给一些建议....
If yes, Kindly give some advice ....
推荐答案
尝试一下
SELECT ID,SUBSTRING_INDEX(SUBSTRING_INDEX(t.CITY_ID, ',', n.n), ',', -1) value
FROM Table1 t CROSS JOIN
(
SELECT a.N + b.N * 10 + 1 n
FROM
(SELECT 0 AS N UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) a
,(SELECT 0 AS N UNION ALL SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL SELECT 9) b
ORDER BY n
) n
WHERE n.n <= 1 + (LENGTH(t.CITY_ID) - LENGTH(REPLACE(t.CITY_ID, ',', '')))
ORDER BY ID,value
FIDDLE DEMO
输出:
ID VALUE
1 12
1 16
1 17
1 18
1 35
2 12
2 16
这篇关于使用mysql将表格列中的逗号分隔值拆分为行?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文